Definition:Aleph-Null

Definition

Aleph-null is the cardinal number of a set which is in one-to-one correspondence with the natural numbers $\N$.

Also known as

Some sources do not hyphenate: aleph null.

Aleph-null is also known as aleph nought.

Also see

• Results about $\aleph_0$ can be found here.

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): aleph-null
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): aleph-null
• 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): aleph-null
• 2021: Richard Earl and James Nicholson: The Concise Oxford Dictionary of Mathematics (6th ed.) ... (previous) ... (next): aleph-null